Paul Casey has revealed the depth of his anger at Vijay Singh after the former world No 1's attack on British golfers before the US Open last week. Singh claimed that the likes of Casey were “too comfortable” and lacked a winning mentality.

With Tiger Woods out of the way for the rest of the season recovering from a knee injury, Casey should be looking forward to an assault on the two remaining majors and making a determined push for a place in the Europe Ryder Cup team. But he is furious that Singh has questioned his work ethic and launched a stinging attack on the Fijian.

“I am angry, he has no clue what I do, so how can he comment?” Casey, who had a second-round 68 to move into contention at the BMW International Open in Munich yesterday, said. “I can only speak for the guys I know well, like Justin Rose, Luke Donald and Ian Poulter, but we are all working incredibly hard and I think it is an unfair shot from Vijay. I would like to see him try to live with me in the gym for a couple of hours.

“He does not know us and he has no evidence to back up what he says. We are all very frustrated that we have not won majors and that our results have not been as good as we would have liked. But it is not down to lack of effort and perhaps when we do make a breakthrough then it will open the door to a lot more wins.

“I don't know what Tiger Woods does on his days off. But before his injury, when he was at a tournament he would often be gone from the course by 1pm. I never thought for a second that he was not working hard to improve.

“Vijay is well known for spending all day at the practice ground. But there are three sides to golf - fitness, technique and the mental side of the game. You can't work on all three at the driving range. If I am not there I am probably working hard at something other than technique. Just because a guy is not at the practice ground 9 to 5 does not mean he isn't working.”

Based in Scottsdale, Arizona, Casey is one of the fittest and strongest men on tour. “If I am not at a tournament I am normally up around 6am to have breakfast and by 7 I am in the gym with my personal trainer - who decides how hard the session is and what we are working on - until 9. Then I have a light snack and get to the golf course by 10 where I practise with my coach, Peter Kostis. Normally we work on my swing and technique for two to 2½ hours up to lunch.

“After lunch we will look at the short game, putting and if I am preparing for a tournament then we will look at whatever specific shot-making will be needed for a particular course. We might also play a few holes. We try to end by 4pm and after that I normally try to go for a bike ride.”

Casey was in contention at the Masters this year before a final round of 79 left him tied for eleventh place, eight strokes behind Trevor Immelman, the winner, and as each major passes without a win for Casey, Donald, Poulter or Lee Westwood, the big hopes of English golf, the pressure on them would appear to grow.

But Casey seems to enjoy playing in the heat of battle. “I find it easier to play when I am in contention to win because I know I am playing well to get into that position in the first place,” he said. “My hands don't shake and I don't look down and see the club moving, but sometimes it is difficult to feel your legs, which is never a good thing.

“The easiest shot to hit under pressure is a drive and the trickiest are the shorter shots because a small difference in club-head speed can make a big difference over whether the ball lands close to the hole or a long way away. But, essentially, once you start the swing you are OK because we hit so many thousands of practice shots that it is all automatic from the moment the club begins moving.”